Friday, April 18, 2008

WSPR (pronounced "whisper") stands for "Weak Signal Propagation Reporter." This program implements transmitting and receiving for a digital soundcard mode called "MEPT_JT", an acronym for "Manned Experimental Propagation Tests, by K1JT". This is the initial release of a GUI-based version of the program. Screen shot.Click here to download WSPR. Then run the resulting executable to install the program. A full manual for WSPR has not yet been written, but a Quick Start guide is available. Program changes since veraion 0.5 are described in the Changelog. A basic description of the WSPR protocol can be found at physics.princeton.edu/pulsar/K1JT/WSPR_Announcement.TXT .

Please send feedback on WSPR and its use to k1jt at arrl dot net.

WSPR Suggested Frequency Matrix

Note: This table reflects current practice. I recently sent out an alternate proposal for 17m and 10m, but that is not reflected here.

Also, please note that many JT65A operators also run WSPR while on JT65A calling frequencies, particularly 7.076 and 14.076.

Tuesday, April 15, 2008

Track vessels directions, find voyage-related information and see a map with current ship positions. The system is based on AIS (Automatic Identification System) which collects the current position on ships through VHF frequencies.

There is a note at http://marinetraffic.blogspot.com/ says that this is an open project and that they are inviting any volunteers wishing to install an antenna plus an AIS receiver and send the data they collect to the central server.